For early season whitetail tree stand or ground blind hunting where it is 60 degrees or warmer, I wear just my Kanab pants and llano top. For 50-60 degrees, I add the llano bottoms. I keep my ASAT bowhunters jacket (think lesser quality Northbranch jacket with pit zips and a hood) in my pack for when I need it.
For mid-season whitetail tree stand or ground blind hunting where it is 50 degrees or less, I layer with my llano's top and bottom, Northbranch pants, Chama hoody, and my ASAT bowhunter's jacket. I really like the Northbranch pants since I can unzip them and vent when I get too warm. I keep my Uncompahgre puffy in my pack for when I need it, and I always put it under my bowhunter's jacket. If I am still hunting the late season, I wear this same ensemble since I tend to stay warm when moving, even if just a little at a time.
For late season whitetail tree stand or ground blind hunting, I go in with my llano's top and bottom, Kanab pants, Chama hoody or ASAT fleece (sometimes both), and either my Uncompahgre puffy jacket or puffy vest. I keep my Sanctuary bibs and jacket in my pack and put them on before I get set up, but I put my puffy back in my pack. I haven't been in the situation where I needed to layer my puffy vest or Uncompaghre jacket underneath the Sanctuary set, but I have them if I need them.
No matter the season, I have yet to find a pair of gloves I like. Once I find the one's that work best this season, I am buying several more pairs. I've tried liners gloves from FL, UA, and Browning...they all sucked and lacked anything I would remotely call durability. The FL soft-shell gloves seemed really promising, but they are too big and the small sizes only exist on paper. The mediums are still big on me even when layered on top of liner gloves. This year, I am trying OR storm sensor gloves for the mid to late season. OR size small is a bit tight on me, but I plan on breaking them in really good before this season to see if I can get that magical glove that fits tight, but not too tight, and keeps my hands warm and dry. The touch screen compatibility will be a much needed bonus. I have a DayOne hand warming muff to keep my hands warm when it is stupid cold out, but I don't like keeping my hands in my pockets all the time, so a good set of well fitting durable gloves are a must for me this year. I also have DayOne ASAT insulated creepers to keep my feet warm while in the stand. They work well, although I wish I got a size up so they were a little easier to get on and off, but then again, they are also my camp slippers and stalking boots for elk, so a good snug fit is probably best (kind of wish I had two pairs....).
For head gear, the FL merino neck gaiter and FL brimmed beanie are outstanding. Mine are ASAT due to my minor ASAT obsession (it's only a problem if I let it be a problem), but I will definitely pick up the blaze orange version for the next time I go rifle hunting (who knows when that will be?). I have a blaze orange fleece beanie and neck gaiter for rifle season, but I really do prefer the FL merino wool options. The hoods off the Sanctuary jacket, Uncompahgre puffy, my bowhunter's jacket, or my Chama hoody are more than enough to keep my head warm if it gets too cold or the weather turns (assuming I layered appropriately).
If the weather forecast calls for rain, I keep at least my Stormtight jacket in my pack. If it is late season and I am determined to hunt (usually the case), I also pack my storm tight pants. If I'm elk hunting, the Stormtight set lives in my pack since the weather can change really fast at elevation.